Rock-drill.



PATENTED APR. 18, 1905.

J. M. HAD/IOR.

ROCK DRILL.

APPLIOATION FILED SEPT. 27. 1904.

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WITNESSES.-

fama/ NO- 787,376. PATENTED APR. 18, 1905. J. M. HAMOR.

ROCK DRILL.

APPLIUATION FILED SEPT. 27, 1904. 2 SHEETS-SHEET 2A Wl TNESSES l nv VEN Tof? Ey i Hmm/Ens TUnirse STATES Patented April 18, 1905.

PATENT OFFICE.

JOI'IN M. HAMOR, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO JOHN M. ROGERS, OF IVILB'IINGTON, DELAIVARE.

ROCK-DRILL.

SPECIFICATION forming part of Letters Patent No. 787,376, dated April 18, 1905.

Application filed September 27, 1904. Serial No. 226,113.

To n//l 'wiz/mt if m/zrf/ #mun/)77u Be it known that I, JOHN Monats I'Imron, a citizen ot the United States, residing' at Philadelphia, county of Philadelphia, and State of l Pennsvlvania, have invented a new and useful Improvement in Rock-Drills, of which the following' is a full, clear, and exact description, reference being' had to the accompanying' drawing's, which form a partof this specil'ication.

My invention relates to rock-drills, and particularly to the controlling-valve mechanism therefor.

The object of the invention is to so construct the valve as to enable it to be assembled, removed, or reassembled without the necessity of nice adjustments of the parts or the possession of any particular skill by the workmen.

The invention also has for its object to provide a valve that will not g'et out of order in use.

The invention also has for'its object to provide a valve that will be simple in construction and cheap to construct.

The. invention consists of the general and specific construction and arrang'ement of parts hereinafter set out, and particularly pointed out in the claims.

lVhile the invention is particularly desig'ned for embodiment in rock-drills, it may be found applicable to other impact-tools operated by steam or compressed air.

ln the drawings, Figure 1 isa longitudinal section through the drill. Fig'. 2 is a section on the line i). L), Fig'. l. Fig'. 3 is a section on the line I) 3 of Fig'. l. Fig'. is a section on the line L L of Fig'. l. Fig'. is an end view of the valve. Fig'. 6 is a side View of the valve looking' toward the rig'ht of Fig'. Fig'. T is a side view of the valve lmiking' toward the left of Fig'.

f/ is the supportingframe; l, the drill-head; c, the piston, and l the cylinder.

f is the nut working' on the threaded shaft j', operated by the crank r/, whereby the cylinder and piston may be carried along' the frame.

/t is the ratchet on shaft f', which is eng'ag'ed b v pawls (not shown) on the rotatable ring' which ring' is provided with pressure surfaces actuated by ports alternately connected with pressure and exhaust in the operation of the piston, whereby the piston is g'iven the usual step-by-step rotation, these parts not being' herein shown, as the same form no part of my invention and are fully set forth in Letters Patent issued to me November 9, 1897, No, 593,214.

Referring' now to the parts embodying' my invention, is the valve-easing', having' the covers/ m at each end of and forming' part of the valve-casing.

n is a rotary valve within the valve-casing'.

o p are nozzles (see Fig'. 2) projecting' from the covers m, respectively, one of said nozzles being' Closed by a plug' while the other is connected with the pipe f7, leading* from a sourceI of pressure-supply.

l ll are passages formed in and extending' lengthwise of the covers ya, respectively, and communicating' with nozzles n l), respectively. 12 13 are channels vformed in the valve-casing' and extending' one alongside of the valve and the other along' the other side of the valve, each channel communicating' with one end of each of the passages l0 ll. These passages or channels l0 ll l2 13 are therefore in constant communication with the som-ce of pressure-supply.

l-L are channels formed in the periphery of the valve and extending' longitudinally thereof adjacent to the channels l2 13, respectively.

i6 is a chamber formed in the periphery of the valve and extendingA longitudinally thereof, and 1T 1S constricted ports connecting' the chamber 16 with the channels 1J; l5, respectively.

v' is a valve-piston secured to the valve-easing' and extending' into the chamber lt', said piston acting' as a wall to divide chamber 16 longitudinally and also performing' the func-Y tion of limiting' the rotary movement of the valve in cach direction. The ports IT IS lead to the chamber 16 on opposite sides of the valve-piston It will be seen from Fig'. lthat whether the valve is moved to the right or to the left the channels 14 and 15 are in constant communication with the channels 12 and 13, respectively. Therefore it will be understood that channels 14 and 15 are constantly supplied with motive fluid and that there is a constant leakage of the same through ports 17 and 18 into chamber 16, so that there is a balanced pressure against the sides of the valve-piston o', tending to hold the valve balanced and immovable. The reciprocation of the valve is effected by allowing the pressure to exhaust alternately from opposite sides of the valvepiston r, as will be hereinafter described.

19 is a channel formed in the periphery of the valve and extending longitudinally thereof midway between the supply-channels 14 and 15.

20 21 are passages formed partly in the cylinder and partly in the valve-casing, leading from opposite ends of the piston-chamber to the valve-chamber.

22 isa passage formed partly in the valvecasing and partly in the cylinder, leading from the valvechamber at a point between the ends of passages 20 and 21 to an exhaust-chamber 23 formed in the cylinder.

t u are openings (see Fig. 2) extending through the wall of the cylinder into exhaustchamber 23, one of said openings being closed by the plug o, while an exhaust-pipe w is secured in the other opening. It will be observed that the channel 19 is always in communication with the exhaust, whether the valve is in one or the other of its extreme positions.

It will be understood that when the valve is in the position shown in Fig. 1 the supplychannel 15 registers with the passage 21, while the exhaust-channel 19 registers with the passage 20, thereby causing the piston to move from right to left, and that when the valve is in the opposite position the supply-channel 14 registers with the passage 20, while the exhaust-channel 19 registers with the passage 21, thereby causing the piston to bev returned to the position shown in Fig. 1.

1 will now describe the means whereby the operation vof the valve is controlled by the piston.

24 is a passage formed partly in the valvecasing and partly in the cylinder, extending from one side of chamber 16 to the pistonchamber.

25 is a passage formed partly in the valvecasing and partly in the cylinder, extending from the other side of chamber 16 to the piston-chamber, one of these passages opening at one side and the other opening at the other side of the longitudinal center of the pistonchamber. 26 is an annular channel formed in the piston.

27 28 are ports extending through the wall of the cylinder from exhaust-chamber 23 to the piston-chamber, the openings into the piston-chamber being in circumferential alinement, respectively, With the openings into the piston-chamber of passages 24 and 25.

When the parts are in the position shown in Fig. 1, the piston will move from right to left, as before described. This causes the channel 26 to4 connect with passage 24 and closes the piston-chamber end of passage 25, permitting the motive Huid to exhaust from the right-hand side of piston r. By reason of the constant pressure on the left-hand side of piston r the valve is turned to its other position, thereby, as before described, causing the piston to move from left to right. This causes the channel 26 to connect with passage 25 and closes the piston-chamber end of passage 24, permitting the motive tluid to exhaust from the left-hand side of piston r. By reason of the constant pressure on the right-hand side of piston 7 the valve is returned to the position shown in Fig. 1. This completes the cycle of operation of the valve and piston.

29 represents bolt-holes in the valve-casing, and 3() bolt-holes in the covers, through which bolts 1/ are passed to secure the covers to the casing.

.e represents bolts by means of which the valve-casing is secured to the cylinder.

It will be observed that the two sides of the valve and of the valve-casing, as well as the two ends and the two covers thereof, are exact counterparts, rendering it virtually impossible for a workman to improperly assemble the parts. The construction is such that no nice adjustments are required, the valve simply being placed within its casing in any position and the casing being placed in either of its two possiblel positions between the covers, the bolt-holes in casing and covers being necessarilyT brought into registry before insei-ting the bolts therethrough to insure a proper adjustment of the casing and covers. The valve mechanism is simple in construction, efficient in operation, and will not get out of order in use.

Having now fully described my invention, whatI claim, and desire to protect by Letters Patent, is-

1. The combination, with the cylinder, the piston-chamber and piston therein, and the rotary valve and its casing, of a passage in the valve-casing adapted to be placed in constant communication with the exhaust, channels in opposite sides of the valve-casing adapted to be placed in constant communication with the supply, three channels in the valve adapted in either position of the valve to communicate with the three channels in the valve-casing, respectively, and passages leading from the ends of the piston-chamber to the valve-chamber, the valve, in its two movements, causing the exhaust-channel in the valve to connect with one or the other of said passages and causing one or the other of the supply-channels in the valve to connect with its corresponding passage, substantially as described.

2. The eoinbination, with the cylinder, the piston-chamber and piston therein, and the rotary valve and its casing, ot' a passage in the valve-casing` adapted to be placed in constant communication with the exhaust, channels in opposite sides ot the valve-casing, passages in opposite ends of the valve-casing connecting with said channels and adapted to be placed in constant communication with the supply, three channels in the valve adapted in either position ot' tne valve to communicate with the three channels in the valve-casing respectively, and passages in the cylinder connecting the ends ot' the piston-chamber with the valve-chamber, the valve, in its two movements, causing the exhaust-channel in the valve to connect with one or the other ot' said cylinder-passages and causing one or the other otl the supply-channels in the valve to connect with the corresponding cylinder-passage, substantially as described.

The combination, with the cylinder, the piston-chamber and piston therein, and the valve and its casing, ot' a stationary piston on the valve-casing extending into a valve-piston chamber in the valve, three channels in the valve, ports connecting the two outside channels respectivelyv with opposite sides ot' the valve-piston chamber, the said two outside channels being adapted to be placed in constant communication with the supply and the middle channel being adapted to be placed in constant communication with the exhaust, means whereby the valve, in its movement, connects opposite ends of the main pistonchamber respectively with the exhaust-channel and one ot' said supply-channels, and means controlled by the main piston to place opposite sides ot' the valve-piston chamber alternately in communication with the exhaust, substantially as described.

i. The combination, with the cylinder, the piston-chamber and piston therein, and the valve and its casing, ot' a stationary piston on the valve-casing extending into a valve-piston chamber in the valve, three channels in the valve, ports connecting the two outside channels respectively with opposite sides ot' the valve-piston chamber, three channels in the valve-casing adapted to register respectively with the three channels in the valve in either position ot' the valve, the two outside valvecasing channels being' adapted to be placed in constant communication with the supply and the middle valve-casing channel being' adapted to be placed in constant communication with the exhaust, means whereby the valve, in its movement, connects opposite ends of the main piston-chamber respectively with the middle valve-channel and one of the outside valve-channels, and means controlled by the main piston to place opposite sides of the valve-piston chamber alternately in communication with the exhaust, substantially as described.

5. The combination, with the cylinder, the piston-chamber and piston therein, and the valve and its casing, ot' a stationary piston on the valve-casing extending into a valve-piston chamber in the valve, three channels in the valve, ports connecting the two outside channels respectively with opposite sides of the valve-piston chamber, three channels in the valve-casing adapted to register respectively with the three channels in the valve in either position ot the valve, two passages in the end ot' the Valve-casing connected with the two outside valve-casing channels, said two passages being adapted to be placed in constant communication with the supply, an exhaustchamber communicating with the middle valve-casing channel, means whereby the valve in its movement, connects opposite ends of the main piston-chamber respectively with the middle valve-channel and one of the outside valve-channels, and means controlled by the main piston to place opposite sides of the Avalve-piston chamber alternately in communication with the exhaust, substantially as described.

6. The combination, with the cylinder, the piston-chamber and piston therein and the valve and its casing, of a stationary piston on the valve-casingextending into a piston-chamber formed in the valve, means whereby motive fluid may be constantly admitted to said valve-piston chamber on both sides of said valve, passages extending from opposite sides ot' the valve to the piston-chamber, an annular channel formed in the piston adapted in the movement ot' the piston to be alternately connected with said passages, ports in said piston-chamber adapted to be placed in constant communication with the exhaust, said annular channel being adapted in the movement of the piston to be alternately connected with said ports, whereby, in the movement of the piston, the opposite sides ol the valvepiston are alternately placed in communication with the exhaust, thereby shil'ting the valve, and means whereby the valve, so shifted, controls the reciprocationof the piston, substantially as described.

7. The combination, with the cylinder, the piston-chamber and the piston therein, ot' a cylindrical valve having t'ormed in its face a piston-chamber and oppositely thereto an exhaust-channel and on each side ot the exhaustchannel, a supply-channel, a valve-casing having formed on its opposite inner faces supply-channels extending longitudinally ot' the valve and in constant communication with the supply-channels in the valve-tace in either position ot' the valve, said valve-casing having formed in its ends passages each ot' which connects the corresponding ends ot' the sup- IOO IIC

ply-channels in the valve-casing, one at least of said passages being adapted to be connected with the supply, means whereby the valvechannels, in the movement of the valve, controls the reciprocation of the piston, and means whereby the piston, in its reciprocation, creates an unbalancing of pressure in the piston valve chamber, substantially as described.

8. The combination, with the cylinder, the piston-chamber, and the piston therein, of a cylindrical valve having supply and exhaust passages and avalve-piston chamber, a valvecasing having supply and exhaust passages communicating with the valve-piston chamber and the supply and exhaust passages in the valve, passages leading to the ends of the piston-chamber for controlling the admission of motive fluid thereto and passages ycontrolled by the piston for actuating' the valve, the arrangement of said passages in the valve and valve-casing being such that the valve-casing and valve ma)T each be divided longitudinally or transversely into two halves substantially -exact counterparts of each other, substantially as described.

9.' The combination, with the cylinder and piston therein, of a rotary valve alongside the cylinder and whose axis extends at right angles thereto, a valve-casing secured to the cylinder and inclosing thevalve, a cover at each end of the valve, there being alining boltholes in casing and covers through which bolts extend to secure the same together, motivetluid passages in the cylinder and valve, and motive-fluid passages in the valve-casing and covers, the ends of the passages in each cover communicating with the corresponding ends ot' passages in the valve-casing, thereby forming an air space or passage in the valve-'casing and covers entirely surrounding the valve, whereby the valve and piston, in their reciprocation, each control the reciprocation of the other, substantially as described.

10. The combination, with the cylinder and piston therein, ot' a rotary valve, a valve-casing secured to the cylinder and inclosing the valve, a cover at each end ot' the valve secured to the casing, motive-duid passages in the cylinder and Valve, and motive-fluid passages in the valve-casing and covers, the ends of the passages in each cover communicating with the corresponding ends of passages in the valve-casing, thereby forming an air space or passage in the valve-casing and covers entirely surrounding the valve, whereby the valve and piston, in their reciprocations, each control the reciprocation of the other, the arrangement of passages being such that the valve-casing and valve may each be divided longitudinally or transversely into two substantially exact counterpart halves, the two covers being also substantially exact counterparts, substantially as described.

l1. The-combination, with the cylinder, the piston-chamber and piston therein, 'the rotary valve, and the valve-casing and end -covers therefor, of passages connecting opposite ends of the main piston-chamber with the valvechamber, an exhaust-chamber in the cylinder, oppositely-disposed openings therefrom adapted to receive an exhaust-pipe, a passage connecting the exhaust-chamber with the valve-chamber, lan exhaust-channel 'formed in and extending longitudinally of the valve and in constantcommunication with the lastnamed passage. two supply-channels formed in the valve and extending longitudinally of the valve on either side of theexhaust-chann'el, supply-channels in the valve-casing extending longitudinallyoi" the valve and in constant communication respectively with the supplychannels in the valve, a cover at each end of the valve casing, supply -passages in each cover the opposite ends olf each of which communicate respectively with the said supplychannels inthe valve-casing, an opening from each supply-passage adapted to receive a supply-pipe, a valve-piston chamber formed in the periphery of and extending longitudinally of the valve, a valve-piston on the valve-casing projecting Within said va-lve-piston chamber, ports connecting said valve-piston chamber with the supply-channels formed in the valve, a passage connecting one side or' said valve-piston chamber with the main pistonchambei; on one side of its longitudinal ceuter, a passage connecting the other side of said valve-piston chamber with the main piston-chamber on the other side of its longitudinal center, ports connectingthe exhaustchamber with the main piston-chamber, the openings thereof into the main piston-chamber being in substantial circumferential ali-nement respectively with the openings into the main piston-chamber of the last-named passages, and an annular channel formed in the main piston, the valve being adapted to rotate on its axis and thereby alternately connect the passages leading to the ends ot' the main' piston-chamber with the exhaust, and the piston, by its reciprocation, alternately connecting the opposite sides ot' the valve-piston chamber with the exhaust by means of said annular channel and the said alining ports and passages, substantially as described.

In testimony of whichinvention I have hereunto set my hand, at Philadelphia, Pennsylvania, on this 23d day ot' September, 1904.

JOHN M. HAMOR.

Witnesses:

FRANK L. BUssER, M. M. HAMILTON. 

